Building Envelope: Caulking, Waterproofing, Masonry and Facade Repair

If it fails: the first hour

What the site contact should do before the technician arrives.

Move furniture, inventory, or equipment away from the area of active water intrusion
Rope off or barricade any area below facade material showing signs of imminent detachment
Photograph the water path or damaged facade element for the repair estimate
Contact an envelope or waterproofing contractor for emergency assessment

What fails

Sealant joint failure at window and panel edgesExterior sealant has a service life, commonly 10 to 20 years depending on product and exposure, and cracks, pulls away, or hardens with age, opening a path for water behind the facade.

Tuckpointing and mortar joint deteriorationMortar joints in brick or block masonry erode faster than the brick itself, and once joints are compromised, water enters the wall assembly and accelerates freeze-thaw damage.

Efflorescence and spalling on masonryWater moving through masonry deposits mineral salts on the surface as efflorescence, and repeated freeze-thaw cycling on saturated masonry causes spalling, where the face of the brick or block breaks away.

Flashing failure at roof-to-wall and window transitionsMetal or membrane flashing directs water away from vulnerable transitions; when it corrodes, is installed incorrectly, or is damaged, water finds its way behind the cladding at that point.

Cladding panel or EIFS damageImpact damage, thermal movement, or moisture intrusion behind exterior insulation finish systems and metal panel cladding causes cracking, bulging, or panel separation from the substrate.

Below-grade waterproofing failureFoundation waterproofing membranes degrade or were installed with gaps, allowing groundwater into below-grade spaces, showing up as damp walls, efflorescence, or standing water after rain.

Expansion joint failureBuilding expansion joints accommodate thermal movement between sections; a failed or missing expansion joint seal transfers stress into adjacent materials, cracking masonry or concrete nearby.

What a service call includes

Inspecting sealant joints, masonry, flashing, and cladding for signs of active or past water intrusion
Removing failed sealant and reapplying a joint sealant matched to the substrate and expected movement
Tuckpointing deteriorated mortar joints to match the original joint profile and mortar type
Repairing or replacing damaged flashing at roof-to-wall and window transitions
Assessing and repairing efflorescence, spalling, or cracking in masonry surfaces
Testing waterproofing repairs where practical, such as a water test on a repaired joint or flashing detail
Documenting the location and extent of moisture-related findings for the facility's records

Preventive checklist

The items a maintenance program should carry for this system. Build a combined checklist across systems with the checklist builder.

Spring

Inspect sealant joints for cracking or separation after winter freeze-thaw cycles
Check masonry for new spalling or efflorescence that appeared over winter

Fall

Complete sealant and masonry repairs before cold weather limits application windows for most sealant products
Check roof-to-wall flashing and gutters before leaf and debris accumulation blocks drainage

Annual

Walk the full building exterior to document sealant joint condition and plan replacement before failure
Review any interior water staining reports against exterior envelope condition to identify a source

What it costs

item	typical range	what moves it
Sealant joint replacement, per linear foot	$4 to $12	Cost depends on joint width, accessibility, and whether lift equipment is needed.
Tuckpointing, per square foot of wall	$8 to $25	Historic or specialty mortar matching costs more than standard repointing.
Flashing repair or replacement, per linear foot	$15 to $40	Complex transitions, such as roof-to-wall corners, cost more than straight runs.
Masonry spall repair, per unit	$50 to $200 per brick or block replaced	Cost rises significantly when matching historic brick color and size.
Below-grade waterproofing repair	$5 to $15 per square foot	Excavation-based repairs cost far more than interior injection or drainage correction methods.

National ranges. Local labor, access, after-hours timing and materials move them. Multi-site programs usually price below one-off calls.

When this is an emergency

Active water intrusion into occupied space, or visible facade material at risk of falling, counts as an emergency because it threatens both property and life safety.

How to choose a provider

Ask how the contractor diagnoses the actual water path rather than only patching the visible symptom
Confirm they match sealant type and mortar composition to the existing substrate, not a generic product
Ask about warranty terms on sealant and waterproofing work, since these systems have a defined service life
Request examples of similar facade material, such as brick, EIFS, or metal panel, in their prior work
Confirm access equipment and safety planning for work above the ground floor

Questions

How long does exterior sealant last on a commercial building?

Most commercial-grade sealants last 10 to 20 years depending on the product, sun exposure, and movement at the joint, though sealants on south and west-facing walls often fail sooner.

What is tuckpointing?

Tuckpointing is the process of removing deteriorated mortar from between bricks or blocks and replacing it with new mortar, restoring the wall's water resistance and structural bond.

What causes efflorescence on a brick wall?

Water moving through the masonry dissolves mineral salts and deposits them on the surface as it evaporates, indicating moisture is passing through the wall assembly.

Is building envelope repair covered by insurance?

Sudden damage, such as from a storm, is often covered, while gradual deterioration from age or lack of maintenance typically is not, which is why documented preventive inspection matters for a claim.